A device for detecting the indentation height of a cigarette packet

Abstract

The utility model discloses a device for cigarette packet indentation height detection, including detection box, laser detection module, multilayer displacement mechanism and negative pressure positioning board the top plate of detection box is integrated with the central control station, one side port department of detection box is provided with the inner frame, laser detection module is arranged on the inner frame above negative pressure positioning board, negative pressure positioning board horizontal fixed displacement end of multilayer displacement mechanism, multilayer displacement mechanism drives negative pressure positioning board and displaces in horizontal direction, and the indentation part and the no indentation part of indentation paper that are adsorbed on the negative pressure positioning board in the flat state are in the detection area of laser detection module respectively, laser detection module and multilayer displacement mechanism are electric connection with central control station respectively.

Description

Technical Field

[0001] This utility model belongs to the field of tobacco packaging production technology, specifically relating to a device for detecting the height of indentations in cigarette packs. Background Technology

[0002] In the production of cigarette label paper, the embossing process directly affects the forming quality and appearance of the packaging box. The traditional testing method in the tobacco industry is to use a micrometer to measure the embossed and unembossed areas of the sample, and then subtract the measurements to obtain the embossed line height.

[0003] This testing method is not only prone to damaging the packaging surface due to manual operation, but also has low testing efficiency; secondly, manual pressing can cause uneven pressure, resulting in unstable measurement data. Utility Model Content

[0004] The purpose of this invention is to provide a device for detecting the height of indentations on cigarette packs. The device applies relatively uniform pressure to the cigarette label paper, causing it to lie flat, and adjusts the position of the flat cigarette label paper so that the indented area and the unindented area are respectively within the detection area of ​​the laser detection module.

[0005] The technical solution adopted by this utility model to solve its technical problem is to propose a device for detecting the height of indentations in cigarette packs, including a detection box, a laser detection module, a multi-layer displacement mechanism, and a negative pressure positioning plate. A central control panel is integrated on the top plate of the detection box, and an inner frame is provided at one port of the detection box. The laser detection module is deployed on the inner frame above the negative pressure positioning plate. The negative pressure positioning plate is horizontally fixed to the displacement end of the multi-layer displacement mechanism. The multi-layer displacement mechanism drives the negative pressure positioning plate to move horizontally, so that the indented part and the non-indented part of the indentation paper, which is adsorbed on the negative pressure positioning plate and is in a flat state, are respectively within the detection area of ​​the laser detection module. The laser detection module and the multi-layer displacement mechanism are electrically connected to the central control panel.

[0006] Furthermore, the inner frame is provided at the front port of the detection box, the inner frame includes two support rods on both sides and a crossbeam on the top, and the laser detection module is deployed on the crossbeam.

[0007] Furthermore, the crossbeam is slidably fixed to the support rods on both sides, making the relative height between the crossbeam and the negative pressure positioning plate adjustable.

[0008] Furthermore, the laser detection module includes a first laser detector and a second laser detector. The detection lasers emitted by the first laser detector and the second laser detector respectively form the detection area at the height position of the upper surface of the negative pressure positioning plate. The indented area is located in the detection area of ​​the first laser detector, and the unindented area is located in the detection area of ​​the second laser detector.

[0009] Furthermore, the detection laser emitted by the first laser detector forms a first angle with the horizontal direction, and the detection laser emitted by the second laser detector forms a second angle with the horizontal direction, and the first angle and the second angle are different.

[0010] The openings of the first included angle and the second included angle are opposite each other, and the two detection laser beams intersect to form an interior angle. The sum of the interior angle and the first included angle and the second included angle is 180°.

[0011] Optionally, the first included angle is 45° and the second included angle is 60°.

[0012] By adjusting the first included angle, the second included angle, and the height between the crossbeam and the negative pressure positioning plate, the detection area is positioned appropriately, preferably on the upper surface of the negative pressure positioning plate.

[0013] Furthermore, a central control panel is integrated on the top plate of the detection box, and the laser detection module, the multi-layer displacement mechanism, and the negative pressure device of the negative pressure positioning plate are electrically connected to the central control panel.

[0014] Furthermore, the multi-layer displacement mechanism is deployed on the base plate of the detection box. The multi-layer displacement mechanism includes a first displacement mechanism and a second displacement mechanism. The base of the first displacement mechanism is horizontally fixed on the base plate. The second displacement mechanism is horizontally located at the displacement end of the first displacement mechanism and is perpendicular to the first displacement mechanism. The first displacement mechanism drives the second displacement mechanism to move left and right in the horizontal direction. The negative pressure positioning plate is horizontally fixed to the displacement end of the second displacement mechanism. The second displacement mechanism drives the negative pressure positioning plate to move back and forth in the horizontal direction. Thus, the multi-layer displacement mechanism drives the negative pressure positioning plate to move in the horizontal direction.

[0015] Furthermore, the multi-layer displacement mechanism also includes a base, the displacement end of the first displacement mechanism is provided with the base, and the second displacement mechanism is fixedly disposed in the base.

[0016] Furthermore, the upper surface of the negative pressure positioning plate is uniformly provided with a plurality of negative pressure holes, which adsorb the indentation paper, keeping it flat on the upper surface of the negative pressure positioning plate.

[0017] Furthermore, the negative pressure positioning plate has a built-in air passage, which includes a main air passage and multiple branch air passages. The main air passage is located in the middle of the negative pressure positioning plate, and the multiple branch air passages are symmetrically distributed on both sides of the main air passage and are evenly spaced. Multiple negative pressure holes are opened downward from the upper surface of the negative pressure positioning plate and communicate with the main air passage or branch air passages.

[0018] Furthermore, the main air duct extends to one side of the negative pressure positioning plate to form an air hole that communicates with the outside. The main air duct is connected to the negative pressure device through the air hole, so that all negative pressure holes have a negative pressure adsorption effect at the same time. The negative pressure device is electrically connected to the central control panel.

[0019] The beneficial effects of this utility model are as follows: This utility model proposes a device for detecting the height of indentations in cigarette packs. The indentation paper is laid flat by a negative pressure positioning plate, and the negative pressure positioning plate is driven by a multi-layer displacement mechanism to realize the translational transport of the indentation paper, so that the indented part and the unindented part of the indentation paper are respectively in the detection area of ​​the laser detection module.

[0020] In this application, the height between the laser detection module deployed on the inner frame and the negative pressure positioning plate is adjustable, so that the influencing parameters of the detection area include not only the emission angle of the detection laser, but also the relative height between the laser detection module and the negative pressure positioning plate. Therefore, by adjusting the emission angle of the detection laser and the relative height between the laser detection module and the negative pressure positioning plate, the detection area can be placed in the desired position, ensuring the accuracy of the detection results. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention. In these drawings, similar reference numerals are used to denote similar elements. The drawings described below are some embodiments of the present invention, but not all embodiments. Other drawings will be readily available to those skilled in the art based on these drawings without any inventive effort.

[0022] Figure 1 This is a structural diagram of a device for detecting the height of indentations in cigarette packs according to an embodiment of the present invention; Figure 2 This is an internal schematic diagram of a device for detecting the height of indentations in cigarette packs according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the layout of the base plate and inner frame; Figure 4 This is a disassembly diagram of the multi-layer displacement mechanism mounted on the base plate; Figure 5 This is a schematic diagram of the deployment of the laser detection module; Figure 6 This is a structural diagram of the positioning component; Figure 7 Side view of the positioning component Figure 8 This is a schematic diagram of the front hole orientation of the negative pressure positioning plate; Figure 9 This is a schematic diagram of the deployment of the positioning components; Figure 10 This is a schematic diagram of the distribution of the negative pressure air passages for the negative pressure positioning plate.

[0023] In the diagram: 1. Detection box; 2. Laser detection module; 3. Multi-layer displacement mechanism; 4. Negative pressure positioning plate; 5. Indentation paper; 6. Trigger; 7. Detection component; 8. Positioning component; 11. Central control panel; 12. Base plate; 13. Inner frame; 21. First laser detector; 22. Second laser detector; 31. First displacement mechanism; 32. Second displacement mechanism; 33. Base; 41. Air hole; 42. Negative pressure hole; 43. Fixing hole; 44. Air passage. Detailed Implementation

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model and the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without creative effort. Furthermore, the design orientation only indicates the relative positional relationship between the components, not the absolute positional relationship.

[0025] This utility model embodiment provides a device for detecting the height of indentations in cigarette packs. Please refer to [link / reference]. Figures 1-10 The system mainly includes a detection box 1, a laser detection module 2, a multi-layer displacement mechanism 3, and a negative pressure positioning plate 4. A central control panel 11 is integrated on the top plate of the detection box 1. An inner frame 13 is provided at one side port of the detection box 1. The laser detection module 2 is deployed on the inner frame 13 above the negative pressure positioning plate 4. The negative pressure positioning plate 4 is horizontally fixed to the displacement end of the multi-layer displacement mechanism 3. The multi-layer displacement mechanism 3 drives the negative pressure positioning plate 4 to move horizontally, so that the creased part and the uncreased part of the creased paper 5, which is adsorbed on the negative pressure positioning plate 4 and is laid flat, are respectively within the detection area of ​​the laser detection module 2. The laser detection module 2 and the multi-layer displacement mechanism 3 are electrically connected to the central control panel 11.

[0026] The height of the crease line on the crease paper can be detected by the laser detection module 2. The laser detection module 2 includes two laser detectors, which form relatively independent detection areas at different positions on the upper surface of the negative pressure positioning plate 4. The multi-layer displacement mechanism 3 drives the negative pressure positioning plate 4 so that the crease area and the non-crease area of ​​the crease paper 5 are respectively in two relatively independent detection areas. The two laser detectors emit detection lasers at different angles to the crease area and the non-crease area, and the height of the crease line can be calculated by the optical path difference between the two laser beams.

[0027] In this application, the laser detection module 2, the multi-layer displacement mechanism 3, and the negative pressure positioning plate 4 are all installed based on the detection box 1. The position of the laser detection module 2 can be relatively fixed. The position of the negative pressure positioning plate 4 is adjusted by the multi-layer displacement mechanism 4 so that the relative position of the laser detection module 2 and the negative pressure positioning plate 4 meets the detection requirements, thereby realizing the height detection of the indentation line of the indentation paper 5 on the negative pressure positioning plate 4 by the laser detection module 2.

[0028] For example, please refer to Figure 1 An inner frame 13 is provided at the front port of the detection box 1. The inner frame 13 includes two support rods on both sides and a crossbeam on top. The laser detection module 2 is deployed on the crossbeam. The spacing between the two support rods can be as follows: Figure 1 , Figure 2 , Figure 3 As shown, the spans on both sides of the bottom displacement mechanism are at least the same as the displacement stroke of the bottom displacement mechanism.

[0029] The crossbeam is slidably fixed to the support rods on both sides, so that the relative height between the crossbeam and the negative pressure positioning plate 4 is adjustable.

[0030] In practical implementation, vertical holes can be made on the support rods, and positioning holes for fixing can be made on the side end of the crossbeam. The crossbeam can be horizontally fixed on the outside of the support rods by fastening bolts, screws, etc., so that the crossbeam can slide up and down on the two support rods in a horizontal state to adjust the relative height between the crossbeam and the negative pressure positioning plate 4.

[0031] It is understandable that the laser detection module 2 is deployed on the crossbeam. When the height of the crossbeam changes, the height of the laser detection module 2 changes accordingly. That is, the relative height between the laser detection module 2 and the negative pressure positioning plate 4 is adjustable.

[0032] In this application, the laser detection module 2 includes a first laser detector 21 and a second laser detector 22. The detection lasers emitted by the first laser detector 21 and the second laser detector 22 respectively form relatively independent detection areas at the height position of the upper surface of the negative pressure positioning plate 4. Optionally, the indented area can be located within the detection area of ​​the first laser detector 21, and the unindented area can be located within the detection area of ​​the second laser detector 22.

[0033] Preferably, the detection laser emitted by the first laser detector 21 forms a first angle with the horizontal direction, and the detection laser emitted by the second laser detector 22 forms a second angle with the horizontal direction, and the first angle and the second angle are different.

[0034] For details, please refer to Figure 5 Starting from the midpoint of the line connecting the first laser detector 21 and the second laser detector 22, adjust the emitted laser of the first laser detector 21 to deflect downwards, and the deflection angle α is the first included angle; adjust the emitted laser of the second laser detector 22 to deflect downwards, and the deflection angle β is the second included angle.

[0035] The laser detectors are deployed on the crossbeam of the inner frame 13, and the calibration position of the laser detectors can be obtained based on the crossbeam. The calibration positions of each laser detector can be the same. By detecting the height between different parts of the crease paper 5 and the calibration position, the height difference between the crease area and the non-crease area can be obtained, which is the height of the crease line.

[0036] By emitting the detection laser at different angles, the geometric path of the laser can vary. Based on the geometric path and emission angle of each laser, the geometric path of the laser is converted into the height between the detection position and the calibration position. The detection position includes the indented area and the non-indented area. The first height value between the indented area and the calibration position and the second height value between the non-indented area and the calibration position can be obtained. The height difference between the first height value and the second height value is the height of the indentation line.

[0037] In one specific embodiment, the first laser detector 21 and the second laser detector 22 are at the same height. The detection laser of the first laser detector 21 illuminates the indentation area at a first angle, and the detection laser of the second laser detector 22 illuminates the non-indentation area at a second angle. The heights represented by the travel of the two detection lasers are different. The height of the indentation line can be calculated based on the reflection time difference of the two lasers.

[0038] For example, the first included angle can be 45° and the second included angle can be 60°. When the height between the crossbeam and the negative pressure positioning plate 4 changes, the emission angle of the two laser beams can be adjusted adaptively so that the detection area falls on the upper surface of the negative pressure positioning plate 4; or, the emission angle of the two laser beams can be fixed and the height between the crossbeam and the negative pressure positioning plate 4 can be adjusted so that the detection area falls on the upper surface of the negative pressure positioning plate 4.

[0039] It should be clarified that the above adjustment methods should be limited to a certain applicable range, rather than being unlimited. The two laser beams should intersect, and the intersection position should be lower than the upper surface of the negative pressure positioning plate 4. When the test is carried out, the two test areas should fall at different positions on the upper surface of the negative pressure positioning plate 4. When there is indented paper 5 that is adsorbed and laid flat on the negative pressure positioning plate 4, the two test areas can correspond to the indented part and the non-indented part, respectively.

[0040] The surface of the embossed paper 5 can be divided into embossed areas and unembossed areas. The embossed areas are the embossed lines, and the unembossed areas are the flat surfaces (areas without embossed lines). The height of the embossed line can be obtained by calculating the height difference between the embossed areas and the unembossed areas.

[0041] In this application, the multi-layer displacement mechanism 3 is used to drive the negative pressure positioning plate 4 to translate. The height of the negative pressure positioning plate 4 is fixed and determined by the height of the multi-layer displacement mechanism 3. The height of the multi-layer displacement mechanism 3 should be lower than the height of the crossbeam.

[0042] With the height of the negative pressure positioning plate 4 fixed, the relative distance between the crossbeam and the negative pressure positioning plate 4 is determined. Therefore, based on the determined incident angle of the detection laser, the optical path difference between the two laser beams is also determined.

[0043] Specifically, a complete laser detector includes a laser emitter and a laser detector. The laser emitter emits laser light, and the laser detector receives reflected laser light. The deployment scheme in this application is based on the emitted laser light from the laser emitter. The deployment of the laser detector for reflecting laser light can be implemented according to specific circumstances or actual needs. Generally, the laser emitter and the laser detector are deployed on the same side of the negative pressure positioning plate 4. The deployment position of the laser detector is not shown in this application. The laser detector only needs to be able to stably receive the corresponding reflected laser light.

[0044] After the laser detector is deployed, the optical path difference between the two laser beams is a fixed value. When both laser beams are irradiated onto a plane of uniform thickness, the optical path difference will not change. Thus, the optical path difference when the two laser beams are irradiated on the upper surface (non-opening part) of the negative pressure positioning plate 4 can be obtained, that is, the fixed value. The reason for this fixed value is the difference in geometric path caused by the different emission angles of the two laser beams, but the height represented by the geometric path of the two laser beams is the same.

[0045] When one laser beam illuminates the indented area and another laser beam illuminates the unindented area, the resulting optical path difference includes a fixed value and the change in optical path caused by the indentation line. Therefore, compared to the fixed value, the extra optical path difference represents the height of the indentation line, which can be converted into the height of the indentation line.

[0046] Based on this, by ensuring that the indented area and the non-indented area are in two different detection zones, the height of the indentation line can be obtained from the change in optical path difference.

[0047] After the laser detector is deployed, the optical path difference between the two laser beams can be measured first. This optical path difference is based on the negative pressure positioning plate 4 and a fixed value is obtained. When the height of the crease line is detected, the measurement data of the crease line can be obtained directly based on the fixed value without considering the influence of paper thickness.

[0048] In a preferred embodiment, the optical path lengths of the two laser beams can be adjusted to be the same, so that during detection, the optical path difference can directly characterize the height of the indentation line, rather than characterizing the height of the indentation line by the amount of change in the optical path difference.

[0049] Although the two laser beams have different emission angles, their geometric path lengths may be the same, that is, the optical path lengths of the two laser beams may be the same, and the optical path difference represented by the fixed value may be zero. In this case, when detecting the height of the indentation line, there is no need for a fixed value, and the height of the indentation line can be obtained directly from the optical path difference at the time of detection.

[0050] When the multi-layer displacement mechanism 3 drives the negative pressure positioning plate 4 to translate, the translation range is always within the span defined by the inner frame, so that the relative positional relationship between the indentation paper 5 mounted on the negative pressure positioning plate 4 and the laser detection module 2 mounted on the crossbeam meets the expectation. That is, when the indentation line to be tested on the indentation paper 5 is in one detection area, the planar area (without indentation line) of the indentation paper 5 is also in another detection area.

[0051] Understandably, with the beam height and the laser detection module 2 deployment angle remaining unchanged, the relative position difference between the two detection areas is fixed; the placement posture of the indentation paper 5 on the negative pressure positioning plate 4 is relatively regular. Generally, it is only necessary to move the indentation line to be tested on the indentation paper 5 to the detection area, and the plane area will be in another detection area, thus realizing the height detection of the indentation line.

[0052] Of course, when laying the indentation paper 5 on the negative pressure positioning plate 4, the negative pressure positioning plate 4 can extend as far as possible to the outside of the inner frame, that is, the negative pressure positioning plate 4 should be moved as far as possible outside the front port of the detection box 1, so as to facilitate laying the indentation paper 5 on it.

[0053] Therefore, the multi-layer displacement mechanism 3 of this application includes translation drive in at least two directions in the horizontal direction. First, it drives the negative pressure positioning plate 4 to translate back and forth, enter and exit the inner frame, and adjust the longitudinal (back and forth) position of the indentation line. Second, it drives the negative pressure positioning plate 4 to translate left and right within the span of the inner frame to adjust the lateral (left and right) position of the indentation line.

[0054] In practical implementation, the multi-layer displacement mechanism 3 should include at least two layers of displacement mechanisms to drive the negative pressure positioning plate 4 to translate in the front-back direction and the left-right direction, so that the indentation line can be translated and adjusted in the horizontal direction and finally placed in the detection area.

[0055] In one specific embodiment, the multi-layer displacement mechanism 3 is deployed on the base plate 12 of the detection box 1. The multi-layer displacement mechanism 3 includes a first displacement mechanism 31 and a second displacement mechanism 32. The base of the first displacement mechanism 31 is horizontally fixed on the base plate 12. The second displacement mechanism 32 is horizontally located at the displacement end of the first displacement mechanism 31 and is perpendicular to the first displacement mechanism 31. The first displacement mechanism 31 drives the second displacement mechanism 32 to move left and right in the horizontal direction. The negative pressure positioning plate 4 is horizontally fixed to the displacement end of the second displacement mechanism 32. The second displacement mechanism 32 drives the negative pressure positioning plate 4 to move back and forth in the horizontal direction. Thus, the multi-layer displacement mechanism 3 drives the negative pressure positioning plate 4 to move in the horizontal direction.

[0056] In this design, the first displacement mechanism 31 is the bottom displacement mechanism, and the second displacement mechanism 32 is the upper displacement mechanism. The base of the bottom displacement mechanism is fixed to the base plate 12, and the displacement end is fixed to the base of the upper displacement mechanism, enabling the bottom displacement mechanism to drive the upper displacement mechanism to translate in a first direction, which in this embodiment is the left-right direction. The displacement end of the upper displacement mechanism is fixed to the negative pressure positioning plate 4, enabling the upper displacement mechanism to drive the negative pressure positioning plate 4 to translate in a second direction, which in this embodiment is the front-back direction. Thus, the bottom displacement mechanism and the upper displacement mechanism can drive the negative pressure positioning plate 4 to move horizontally.

[0057] In this application, the multi-layer displacement mechanism 3 also includes a base 33, the displacement end of the first displacement mechanism 31 is provided with the base 33, and the second displacement mechanism 32 is fixedly disposed in the base 33.

[0058] Please see Figure 2 , 3 4. The base 33 has a groove structure. The base of the second displacement mechanism 32 is placed in the groove and fixed. The base 33 can increase the displacement stability of the first displacement mechanism 31.

[0059] For example, the first displacement mechanism 31 is driven by a telescopic motor, and the telescopic rod drives the base 33 to move. Two guide rails can be configured on the base of the first displacement mechanism 31. The two guide rails are located on both sides of the telescopic rod. Sliding blocks are configured on the base 33 corresponding to the two guide rails. The sliding blocks slide at the upper limit of the guide rails, so that the telescopic rod is more stable when driving the base 33 to move.

[0060] A positioning component can also be configured between the base of the first displacement mechanism 31 and the base 33. The positioning component can be located on one side of the telescopic rod, and the space supported by the sliding block and the guide rail can be used to deploy the positioning component. The positioning component may include a trigger 6 and a detection component 7. The trigger 6 can move with the base 33, and the detection component 7 is fixed on the base of the first displacement mechanism 31. For the specific structure of the positioning component, please refer to [reference needed]. Figure 6 , Figure 7 .

[0061] The trigger element 6 can be a blocking element, and the detection element 7 can be a photoelectric sensor. The middle of the detection element 7 is a detection channel, and photoelectric sensors are arranged on both sides of the detection channel. When the trigger element 6 passes through the detection channel, it blocks the light and generates a feedback signal to determine that the base 33 has reached a specific position. It can be understood that the positioning component can be set at the boundary position to indicate the end point of the displacement mechanism's stroke.

[0062] The second displacement mechanism 32 is driven in the same way as the first displacement mechanism 31. Guide rails and sliding blocks are arranged between the negative pressure positioning plate 4 and the base of the second displacement mechanism 32 to make the displacement of the negative pressure positioning plate 4 more stable. The negative pressure positioning plate 4 is relatively large, and two sliding blocks can be configured on each guide rail, such as... Figure 4 As shown in the image.

[0063] When the positioning component is applied to the second displacement mechanism 32, the deployment position can be the same as that of the first displacement mechanism 31, while the trigger 6 can be deployed on the back of the negative pressure positioning plate 4, and the detection component 7 can be deployed on the base of the second displacement mechanism 32.

[0064] In this application, the positioning component can be used to feed back the arrival signal. A pair of positioning components can be configured on each layer of the displacement mechanism, which are located at the displacement boundary of the displacement mechanism respectively.

[0065] For compatibility reasons, the detection component 7 can be positioned on the base of each layer displacement mechanism. Long mounting holes can be opened on the base of the displacement mechanism to adjust the installation position of the detection component 7 according to actual needs, thus accommodating boundary requirements under different conditions.

[0066] In this application, the height of the negative pressure positioning plate 4 supported and fixed by the multi-layer displacement mechanism 3 is fixed, and the height between the laser detection module 2 and the negative pressure positioning plate 4 is adjusted by a sliding adjustable crossbeam; the position of the crossbeam can also be fixed, and the height of the negative pressure positioning plate 4 can be adjusted by the multi-layer displacement mechanism 3.

[0067] A third displacement mechanism can be added to drive the negative pressure positioning plate 4 to rise and fall in the vertical direction. The base of the third displacement mechanism can be fixed to the moving end of the second displacement mechanism 32, so that the horizontal displacement mechanism composed of the first displacement mechanism 31 and the second displacement mechanism 32 and the vertical displacement mechanism composed of the third displacement mechanism form a three-axis displacement mechanism, which drives the negative pressure positioning plate 4 to achieve displacement. The displacement direction includes the horizontal direction and the vertical direction.

[0068] In this application, the negative pressure positioning plate 4 is used to achieve negative pressure adsorption of the indentation paper 5, which fixes the indentation paper 5 laid flat on the negative pressure positioning plate 4 and keeps it in a flat state, creating more favorable detection conditions for the laser detection module 2 and ensuring the accuracy of the detection results.

[0069] In one specific embodiment, a plurality of negative pressure holes 42 are evenly distributed on the upper surface of the negative pressure positioning plate 4. The plurality of negative pressure holes 42 adsorb the indentation paper 5, so that it remains flat on the upper surface of the negative pressure positioning plate 4.

[0070] The negative pressure power of multiple negative pressure holes 42 can be provided by a negative pressure device. An airflow channel can be opened in the negative pressure positioning plate 4, and each negative pressure hole 42 is connected to the airflow channel. The airflow channel is connected to the negative pressure device, so that each negative pressure hole 42 has a negative pressure adsorption effect.

[0071] In one feasible embodiment, please refer to Figure 10 The negative pressure positioning plate 4 has an internal airway 44, which includes a main airway and multiple branch airways. The main airway is located in the middle of the negative pressure positioning plate 4, and the multiple branch airways are symmetrically distributed on both sides of the main airway and are evenly spaced. Multiple negative pressure holes 42 are opened downward from the upper surface of the negative pressure positioning plate 4 and are connected to the main airway or branch airways.

[0072] The main air duct extends to one side of the negative pressure positioning plate 4 to form an air hole 41 that communicates with the outside. The main air duct is connected to the negative pressure equipment through the air hole 41, so that all the negative pressure holes 42 have a negative pressure adsorption effect at the same time.

[0073] It should be clarified that a through-hole 43 should also be provided on the negative pressure positioning plate 4 to fix it to the sliding block and the telescopic shaft, so that the negative pressure positioning plate 4 can be smoothly driven by the second displacement mechanism 32 and move along the telescopic direction of the telescopic shaft. The fixing hole 43 should be provided in an area outside the air passage 44.

[0074] An L-shaped positioning element 8 can be installed on the upper surface of the negative pressure positioning plate 4 to determine the laying position of the creasing paper 5. It can be located in the upper left corner. The positioning element 8 should not block the negative pressure hole 42 as much as possible, so that the corner position of the creasing paper 5 close to the positioning element 8 can also be stably adsorbed.

[0075] In this application, the laser detection module 2, the multi-layer displacement mechanism 3, and the negative pressure device of the negative pressure positioning plate 4 are electrically connected to the central control console 11. The central control console 11 may have a display screen or a touch screen, which can be used to perform detection, display detection results, etc. The central control console 11 also includes a specific data processing unit to calculate the height of the indentation line based on the reflection time difference between the two laser beams.

[0076] The data processing unit can be built based on a microcontroller, programmable logic circuit FPGA, etc. Based on the known incident angle and the optical path difference between the two laser beams relative to the negative pressure positioning plate 4, the height can be calculated by comparing the reflection time difference of the two laser beams when the two reflected laser beams on the indentation paper 5 are received.

[0077] It should be clarified that when performing testing using the device of this application, it is necessary to ensure that the two laser beams fall in the correct positions, that is, one laser beam falls on the indentation area and the other laser beam falls on the area without indentation.

[0078] The device described in this application is used for detecting the height of indentations on cigarette packs. First, a fixed value is determined after the deployment of two sets of laser emitters (A and B). During the detection, the two sets of laser emitters are directed towards the indented paper at different angles or heights to ensure that one laser beam falls on the indented area and the other laser beam falls on the unindented area. A high-precision photoelectric sensor is used to receive the reflected signals of the two laser beams respectively. The height of the indentation line is calculated based on the reflection time difference of the two laser beams and the fixed value.

[0079] It is feasible to configure an alarm module on the detection box 1 and set a corresponding height threshold for the indentation line. The calculated height of the indentation line is converted into an electrical signal and compared with the height threshold through a comparator. If the height of the indentation line exceeds the tolerance, it is judged as a non-conforming product and an alarm is triggered.

[0080] The height threshold can be adapted according to the process or brand, for example, different processes have different height thresholds.

[0081] Furthermore, dual-laser differential compensation technology can be employed to eliminate single-point measurement errors and improve the detection accuracy of minute indentations. The asymmetric optical path design enhances adaptability to complex surfaces (such as hot stamping and matte materials). The modular structure allows integration into XY-axis mechanical motion devices, enabling multi-directional texture detection.

[0082] With an accuracy of ±0.01mm, it meets the stringent requirements of cigarette pack indentation processes. Non-contact measurement avoids damage to the packaging surface. Response time ≤10ms, suitable for high-speed inspection. Reduces manual quality inspection costs and improves product yield.

[0083] In practical implementation, laser emitters A and B can be selected as visible-red lasers with a wavelength of 650nm and a power ≤5mW, conforming to Class II safety standards. The laser receiving module receives and calculates the feedback laser time to form voltage data; the data processing unit integrates an STM32 microcontroller to calculate the two sets of laser feedback voltage values ​​and form altitude data through data calibration.

[0084] In application, cigarette label paper is placed in the designated detection area. Two laser beams simultaneously scan the crease line (crease area) and the baseline (non-crease area), capturing the reflected signals and calculating the height of the crease line. If it exceeds the threshold (e.g., 0.8mm ± 0.05mm), an alarm is triggered. If configured as a production line, a sorting mechanism can be deployed to remove unqualified products and retain only qualified products.

[0085] Traditional manual measurement of the crease line height on cigarette label boxes, using a micrometer, takes approximately 10 minutes per sample. Using the device described in this application, the measurement time is reduced to less than 5 minutes, achieving a 100% improvement in efficiency. More importantly, this method completely eliminates subjective biases caused by manual measurement techniques, visual errors, and differences in judgment standards, significantly enhancing the standardization of the testing process. This technological upgrade not only achieves a breakthrough in both testing efficiency and quality control but also provides reliable technical support for the precise control of cigarette packaging process parameters.

[0086] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0087] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific embodiments of the present invention are limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A device for detecting the height of indentations in cigarette packs, characterized in that, The device includes a detection box (1), a laser detection module (2), a multi-layer displacement mechanism (3), and a negative pressure positioning plate (4). A central control panel (11) is integrated on the top plate of the detection box (1). An inner frame (13) is provided at one side port of the detection box (1). The laser detection module (2) is deployed on the inner frame (13) above the negative pressure positioning plate (4). The negative pressure positioning plate (4) is horizontally fixed to the displacement end of the multi-layer displacement mechanism (3). The multi-layer displacement mechanism (3) drives the negative pressure positioning plate (4) to move horizontally, so that the creased part and the uncreased part of the creased paper (5) that is adsorbed on the negative pressure positioning plate (4) and is laid flat are respectively in the detection area of ​​the laser detection module (2). The laser detection module (2) and the multi-layer displacement mechanism (3) are electrically connected to the central control panel (11).

2. The device for detecting the height of indentations in cigarette packs according to claim 1, characterized in that, The inner frame (13) is provided at the front port of the detection box (1). The inner frame (13) includes two support rods on both sides and a crossbeam on the top. The laser detection module (2) is deployed on the crossbeam.

3. The device for detecting the height of indentations in cigarette packs according to claim 2, characterized in that, The crossbeam is slidably fixed to the support rods on both sides, so that the relative height between the crossbeam and the negative pressure positioning plate (4) is adjustable.

4. The device for detecting the height of indentations in cigarette packs according to claim 1, characterized in that, The laser detection module (2) includes a first laser detector (21) and a second laser detector (22). The detection lasers emitted by the first laser detector (21) and the second laser detector (22) respectively form the detection area at the height position of the upper surface of the negative pressure positioning plate (4). The indented part is located in the detection area of ​​the first laser detector (21), and the unindented part is located in the detection area of ​​the second laser detector (22).

5. The device for detecting the height of indentations in cigarette packs according to claim 4, characterized in that, The detection laser emitted by the first laser detector (21) forms a first angle with the horizontal direction, and the detection laser emitted by the second laser detector (22) forms a second angle with the horizontal direction, and the first angle and the second angle are different.

6. The device for detecting the height of indentations in cigarette packs according to claim 1, characterized in that, The multi-layer displacement mechanism (3) is deployed on the base plate (12) of the detection box (1). The multi-layer displacement mechanism (3) includes a first displacement mechanism (31) and a second displacement mechanism (32). The base of the first displacement mechanism (31) is horizontally fixed on the base plate (12). The second displacement mechanism (32) is horizontally located at the displacement end of the first displacement mechanism (31) and is perpendicular to the first displacement mechanism (31). The first displacement mechanism (31) drives the second displacement mechanism (32) to move left and right in the horizontal direction. The negative pressure positioning plate (4) is horizontally fixed to the displacement end of the second displacement mechanism (32). The second displacement mechanism (32) drives the negative pressure positioning plate (4) to move back and forth in the horizontal direction. Thus, the multi-layer displacement mechanism (3) drives the negative pressure positioning plate (4) to move in the horizontal direction.

7. The device for detecting the height of indentations in cigarette packs according to claim 6, characterized in that, The multi-layer displacement mechanism (3) also includes a base (33), the displacement end of the first displacement mechanism (31) is provided with the base (33), and the second displacement mechanism (32) is fixedly disposed in the base (33).

8. The device for detecting the height of indentations in cigarette packs according to claim 1, characterized in that, The upper surface of the negative pressure positioning plate (4) is uniformly provided with a plurality of negative pressure holes (42), which adsorb the indentation paper (5) and keep it in a flat state on the upper surface of the negative pressure positioning plate (4).

9. The device for detecting the height of indentations in cigarette packs according to claim 8, characterized in that, The negative pressure positioning plate (4) has an air passage (44) inside. The air passage (44) includes a main air passage and multiple branch air passages. The main air passage is located in the middle of the negative pressure positioning plate (4). The multiple branch air passages are symmetrically distributed on both sides of the main air passage and are evenly spaced. Multiple negative pressure holes (42) are opened downward from the upper surface of the negative pressure positioning plate (4) and communicate with the main air passage or branch air passage.

10. The device for detecting the height of indentations in cigarette packs according to claim 9, characterized in that, The main air duct extends to one side of the negative pressure positioning plate (4) to form an air hole (41) that communicates with the outside. The main air duct is connected to the negative pressure device through the air hole (41), so that all negative pressure holes (42) have a negative pressure adsorption effect at the same time. The negative pressure device is electrically connected to the central control panel (11).

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